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Clinical Research

Tirzepatide outcompetes long-acting insulin in managing type 2 diabetes: a meta-analysis of three phase 3 randomized controlled trials

Abstract

In this systematic review and meta-analysis, we compared the efficacy and safety of tirzepatide with those of long-acting or ultra-long-acting insulin for type 2 diabetes. PubMed, Web of Science, Scopus, and Google Scholar were searched from the inception to August 20, 2023. All clinical trials or randomized clinical trials comparing the efficacy of tirzepatide with long-acting or ultra-long-acting insulin for treating type 2 diabetes were included. Three randomized clinical trials, namely SURPASS-3, SURPASS-4, and SURPASS-AP-Combo, with 4339 patients were included. Compared with daily insulin glargine and degludec, once-weekly tirzepatide significantly decreased HbA1c (WMD −1.08%, 95% CI (−1.37, −0.78)), 2h-posprandial blood sugar (BS) (WMD −28.19 mg/dL, 95% CI (−44.98, −11.41)), pre-meal BS (WMD −11.86 mg/dL, 95% CI (−22.83, −0.9)), body weight (WMD −10.61 kg, 95% CI (−13.24, −7.97)), systolic blood pressure (WMD −6.47 mmHg, 95% CI (−8.32, −4.61)), diastolic blood pressure (WMD −2.30 mmHg, 95% CI (−3.05, −1.55)), total cholesterol (WMD −4.78%, 95% CI (−7.05, −2.50)), triglyceride (WMD −14.49%, 95% CI (−19.55, −9.43)), LDL cholesterol (WMD −5.98%, 95% CI (−9.83, −2.13)), and VLDL cholesterol (WMD −14.18%, 95% CI (−19.03, −9.33)) and increased HDL cholesterol (WMD 7.13%, 95% CI (−9.83, −2.13)), with a lower risk of hypoglycemia defined as BS ≤ 70 mg/dL (RR 0.46, 95% CI (0.28, 0.75)). All doses of once-weekly tirzepatide (5 mg, 10 mg, and 15 mg) were superior or non-inferior to insulin. Once-weekly tirzepatide can be a substitution for long-acting insulin in type 2 diabetes with a greater efficacy.

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Fig. 1
Fig. 2: The summary of efficacy outcomes.
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MA conceptualized this article, performed the literature search, reviewed the retrieved articles, analyzed data, wrote the draft, edited the draft, and designed the figures. MP performed the literature search, and reviewed the retrieved articles. RMJ and ARD critically edited the article. All authors had full access to data and approved the last version of this article for publication.

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Correspondence to Moein Ala.

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Ala, M., Mohammad Jafari, R., Dehpour, A.R. et al. Tirzepatide outcompetes long-acting insulin in managing type 2 diabetes: a meta-analysis of three phase 3 randomized controlled trials. Int J Obes 48, 1684–1695 (2024). https://doi.org/10.1038/s41366-024-01621-4

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